23 Feb
2011
23 Feb
'11
10:53 a.m.
Hi all,
I am running some tests/experiments with the burst_ind branch. I want to be able
to only follow the immediate assignments for my TMSI as it is difficult to
verify that the bursts are indeed my traffic. However, I suspect this is not
possible using only downlink traffic as without the channel request from the MS
I cannot match the resulting IA? I would need to capture uplink too?
I would be grateful if someone could confirm if this is the case or if there is
a way around this issue?
Many thanks,
Matt.
23 Feb
23 Feb
11:10 a.m.
New subject: Converting Layer1 and/or Layer23 to GSM850
I am using a GSM900/1800/1900 handset (GTA02), and want it to be able to receive on the
GSM850 band as well.
This is a challenge I want to take on. Has this been done already? Is is physically
possible? Ideas for where to start?
Thanks,
Uri
3:34 p.m.
On Wed, 23 Feb 2011 09:53:34 +0000 (GMT), MATTHEW EVANS wrote:
I am running some tests/experiments with the burst_ind branch. I want
to be able
to only follow the immediate assignments for my TMSI as it is
difficult to
verify that the bursts are indeed my traffic. However, I suspect this
is not
possible using only downlink traffic as without the channel request
from the MS
I cannot match the resulting IA? I would need to capture uplink too?
Even if you would capture the uplink on the RACH you would not be able
to
distinguish your phones request using your tmsi because IAs refer to
requests by
their Random Reference (04.08, 9.1.8). Only if you knew this reference
you could
follow only your phones DCHs. The first time a tmsi/imsi may be sent is
on an
already established DCH.
Of course you could still implement something that only if a RACH
request is
received on uplink the IA is followed, so you could be sure to follow
only
requests from phones in your vicinity.
Regards,
Mad
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2 comments
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participants (3)
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Mad -
MATTHEW EVANS -
Uri Savoray